“Comparison of 0.25% Bupivacaine with Tramadol Versus 0.125% Bupivacaine with Tramadol in Epidural B Analgesia for Labor Pain”, mfm, vol. 33, no. 5, Apr. 2024, Accessed: Dec. 26, 2025. [Online]. Available: https://medicalforummonthly.com/index.php/mfm/article/view/713